Triggering an Aura - basics - please help

[ChaosWarlock]

I would like to make some custom auras through triggers but I am not sure where to start. Could someone please explain the basic concept of creating an aura with triggers?

Example: Slow Aura - slows movement speed of nearby enemies.
I would run a trigger every .5 seconds of game time that creates a dummy unit and casts slow on all enemies in range of the aura. How do I then remove the effects of slow when they leave the range of the aura?

Am I on the right track here or is there a better approach?

Thank you in advance for the help!

EDIT - I am not trying to trigger a slow aura. I have given it as an example. I am only trying to understand how to trigger any aura. How to add/remove the effects that I want.

 

[Cloak_Master]

Make an unholy aura with negative movement speed bonus values that targets enemies.

 

[ChaosWarlock]

The slow aura was just an example. I want to make more complex auras that are not able to be done by just changing values on a standard aura. This is why I am asking for help with Triggering an aura.

 

[Never_Quit]

i know no way of "creating an aura" with triggers.

I believe that you will need to use the preset, then modify the units with that buff or effect.

 

[ZiggyMcjoney]

Periodic timer which casts a spell with a duration with the same length as the periodic timer on units which have the particular buff.
So say, every 1.00 seconds of game time, all units with the buff Brilliance Aura have a 1.00 second Inner Fire cast on them by a dummy unit?

Not sure what the best way to trigger that is, it was just an idea.

 

[PoZoR]

trigger using movement speeds instead. you will have to use complex systems to store movement speeds of every unit you are dealing with. u can then use "unit comes within range" or unit leaves region.

actually that's stupid, sicne you're making an aura, you would have to show a buff anyway, so a dummy aura first, and then you can detect units periodically if they have the buff or not and set their movement speeds accordingly.

the best solution would still be endurance aura with negative values, i dont really understand why u want to trigger the movement speeds when it cna be so easily done by shift clicking the movement speed values in endurance aura.

 

[ChaosWarlock]

The slow aura was just an example. I want to make more complex auras that are not able to be done by just changing values on a standard aura. This is why I am asking for help with Triggering an aura.

I updated the original post to make it more clear.

 

[PoZoR]

as long as the skill is an aura, you will add a buff. the buff can be a dummy, it doesnt matter. you can use the trigger condition "unit has buff of type". Use low duration spells casted from dummies, 2 seconds is ok. then make a 1 second periodic trigger. make sure you remove leaks, otherwise it will lag like crazy.

 

[TriggerHappy]

Romeks Unit Aura Control?

 

[ChaosWarlock]

Pozor - I think I see where you are going with that. I'll give it a try thank you.

TriggerHappy - I don't know JASS and I really don't want to put something into my map if I don't know how it works. But thank you for the post I'm sure someone that uses JASS will see it and get good use out of it.

 

[Slapshot136]

what ZiggyMcjoney said would look something like this

event - unit learns an ability
conditions - ability learned is equal to (aura)
actions - add (triggering unit) to (auraunitgroup)

event - every 1 seconds of game time
conditions - none
actions - pick every unit in (auraunitgroup) and do actions*
set (userunit) = (picked unit)
*pick every unit within (aurarange) matching (matching unit is affected by aura = true) and do actions**
**create 1 dummy for (owner of (userunit)
**order (last created unit) to (cast spell with desired effect) on (picked unit)
**remove position leaks/add expiration timer
*remove unit group leak
remove unit group leak

 

[ChaosWarlock]

Slapshot136 and ZiggyMcjoney - Thank you, I think I have an understanding of how to do it now. This is really helpful!

 

[Dameon]

Here you go, right out of my own map, this is a damage aura much like immolation but the damage is based on the Str of the hero useing it, the PH array and the boolean are set at hero select. This aura also gives the main unit a 1% HP regeneration.

Ability Hellion U
    Events
        Time - Every 1.00 seconds of game time
    Conditions
    Actions
        For each (Integer FEIF_Interger) from 1 to 2, do (Actions)
            Loop - Actions
                Player Group - Pick every player in Team[FEIF_Interger] and do (Actions)
                    Loop - Actions
                        If (All Conditions are True) then do (Then Actions) else do (Else Actions)
                            If - Conditions
                                Boolean_Hellion[(Player number of (Picked player))] Equal to True
                                (Unit_PH[(Player number of (Picked player))] is alive) Equal to True
                            Then - Actions
                                Set Temp_Point = (Position of Unit_PH[(Player number of (Picked player))])
                                Set Temp_UG = (Units within 800.00 of Temp_Point matching (((Owner of (Matching unit)) is an enemy of (Picked player)) Equal to True))
                                Unit Group - Pick every unit in Temp_UG and do (Actions)
                                    Loop - Actions
                                        Unit - Cause Unit_PH[(Player number of (Picked player))] to damage (Picked unit), dealing (Real((Strength of Unit_PH[(Player number of (Picked player))] (Exclude bonuses)))) damage of attack type Chaos and damage type Fire
                                Unit - Set life of Unit_PH[(Player number of (Picked player))] to ((Life of Unit_PH[(Player number of (Picked player))]) + ((Real((Strength of Unit_PH[(Player number of (Picked player))] (Exclude bonuses)))) x 0.01))
                                Custom script:   call RemoveLocation (udg_Temp_Point)
                                Custom script:   call DestroyGroup (udg_Temp_UG)
                            Else - Actions

 

[XeNiM666]

may i suggest using Romek's Unit Aura Control System

 

[DBZ-123]

may i suggest using romek's unit aura control system

triggerhappy - i don't know jass and i really don't want to put something into my map if i don't know how it works. But thank you for the post i'm sure someone that uses jass will see it and get good use out of it.

 

[Igor_Z]

Well can u just make a negative endurance aura or unholy aura. Use Shift button of keyboard + left click from mouce and add a negative value

 

[istar]

EDIT - I am not trying to trigger a slow aura. I have given it as an example. I am only trying to understand how to trigger any aura. How to add/remove the effects that I want.

Well can u just make a negative endurance aura or unholy aura. Use Shift button of keyboard + left click from mouce and add a negative value

...-.-
a dummy aura ability to give marker buff, then periodic time to cast actual buff